The improvements of welding technique play significant roles in the industrial developments. Due to the extremely high temperature and unevenly-distributed temperature field which are generated from welding process, the original materials have different shrink velocities during cooling, re suiting in the generation of residual stresses around the surrounding welding area.While residual stress can significantly affect the lifetime of weldments, temperature generated from welding process has been proved to be one of the major factors which influences the texture of metal material and mechanical features.Therefore it is necessary to simulate the temperature field, which can be used to optimize the design of weldments.In this study the three-dimension finite element analysis software, SYSWELS was used to simulate the appropriate constraints imposed on T-type tube, through which optimal welding design was achieved.%焊接技术的发展对于促进工业发展具有举足轻重的作用.由于焊接过程产生的局部高温及不均匀的温度场,使焊接原材料在冷却过程中收缩速度不一致,从而在焊缝周围区域产生残余应力以及形变,直接影响焊件的使用寿命,而焊接过程产生的焊接温度是影响焊件金属材料组织和机械性能的主要原因,因此,温度场的模拟研究对优化焊件结构的分析是至关重要的.利用三维有限元分析软件SYSWELD对T形接头进行焊接模拟仿真,并对焊缝冷却过程中温度场以及残余应力进行详细的分析.
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